The Private Special Purpose Task Forces (SPTF), commonly referred to as the Calaveras, because of the skull-like face masks they wear, is a private military company commisioned by President Saleno to fight against Merc rebels led by ex-army captain Emiliano Torres. The PMCs consist of tactical and combat specialists that are experts in urban warfare. The federal army forces still play a role, but since they aren't properly trained for urban fighting, they rely heavily on the Calaveras. They also provide aid to the Raccoon in her hunt for Emiliano.